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 ###Instrução: Quais superfícies têm a pontuação final de 6–1, 6–7 (2–7), 7–6 (7–5), 7–6 (10–8)?
 ###Tabelas: CREATE TABLE 2007_rankings (2007_rankings_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Country VARCHAR, Value ($M) INT, Debt as %of value VARCHAR, % change on year VARCHAR, Revenue ($M) INT, Operating income($m) INT) CREATE TABLE singles:_19_11_titles_8_runner-ups (singles:_19_11_titles_8_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE personal_bests (personal_bests_id AUTO_INCREMENT PRIMARY KEY, Surface VARCHAR, Event VARCHAR, Time ( h : m : s ) VARCHAR, Date VARCHAR, Place VARCHAR) CREATE TABLE season_7_2011 (season_7_2011_id AUTO_INCREMENT PRIMARY KEY, Series # INT, Season # INT, Title VARCHAR, Directed by VARCHAR, Original air date VARCHAR, Production code INT) CREATE TABLE jersey_progress_chart (jersey_progress_chart_id AUTO_INCREMENT PRIMARY KEY, Stage (Winner) VARCHAR, General Classification Yellow Jersey VARCHAR, Mountains Classification Green Jersey VARCHAR, Points Classification Navy Blue Jersey VARCHAR, Intermediate Sprints Classification Red Jersey VARCHAR, Team Classification VARCHAR)  
SELECT Surface FROM singles:_19_11_titles_8_runner-ups WHERE Score in the final = 6–1, 6–7 (2–7) , 7–6 (7–5) , 7–6 (10–8)